thunderbird is vulnerable to arbitrary code execution. A remote attacker is able to execute arbitrary code via a multipart/alternative email message containing text that causes access to an incorrect object type.
secunia.com/advisories/35561
secunia.com/advisories/35602
secunia.com/advisories/35633
secunia.com/advisories/35882
securitytracker.com/id?1022433
slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.425408
www.debian.org/security/2009/dsa-1830
www.mandriva.com/security/advisories?name=MDVSA-2009:141
www.mozilla.org/security/announce/2009/mfsa2009-33.html
www.redhat.com/security/updates/classification/#moderate
www.redhat.com/support/errata/RHSA-2009-1134.html
www.securityfocus.com/bid/35461
www.slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.454275
access.redhat.com/errata/RHSA-2009:1126
bugzilla.mozilla.org/show_bug.cgi?id=495057
exchange.xforce.ibmcloud.com/vulnerabilities/51315
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9994
www.redhat.com/archives/fedora-package-announce/2009-July/msg00444.html
www.redhat.com/archives/fedora-package-announce/2009-July/msg00504.html